<template>
  <div class="todo-footer"
       v-show="total">
    <label>
      <!-- <input type="checkbox"
             :checked="isAll"
             @change="checkAll" /> -->
      <input type="checkbox"
             v-model="isAll" />
    </label>
    <span> <span>已完成 {{doneTotal}}</span> / 全部 {{total}}</span>
    <button class="btn btn-danger"
            @click="clearDone">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: 'MyFooter',
  props: ['todos'],
  computed: {
    total () {
      return this.todos.length;
    },
    doneTotal () {
      return this.todos.reduce((pre, todo) => {
        return pre + (todo.done ? 1 : 0);
      }, 0)
    },
    isAll: {
      get () {
        return this.total === this.doneTotal && this.total > 0;
      },
      set (value) {
        // this.checkAllTodo(value);
        this.$emit('checkAllTodo', value)
      }
    }
  },
  methods: {
    // checkAll (e) {
    //   //console.log(e.target.checked);
    //   this.checkAllTodo(e.target.checked);
    // },
    clearDone () {
      // this.clearDoneTodo();
      this.$emit('clearDoneTodo')
    }
  },
};
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
